Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 244, part 3
The Relationship Between Geology and Landslide Hazards of Atchison, Kansas, and Vicinity--Table 4

Table 4. Gradation for 44 samples of shale and unconsolidated units.

	ASTM gradation
Rock unit	Gravel	Sand	Silt	Clay	Number of samples
alluvium					0
landslides	0.4-12.6	2.2-8.0	32.4-56.0	29.0-65.0	5
loess	0	0.3-10.0	59.6-79.0	11.0-39.8	6
"Nortonville clay"	0	1.5-4.5	45.0-49.0	49.5-50.0	2
glacial drift	0-6.5	28.5-55.4	17.5-36.7	24.0-35.4	5
Atchison formation					0
Topeka Limestone					0
Calhoun Shale	0	6.0	38.0	56.0	1
Deer Creek Limestone	0	5.0-8.0	38.0-59.0	33.0-57.0	4
Tecumseh Shale	0	7.5	59.0	33.5	1
Lecompton Limestone					0
Kanwaka Shale	0-7.8	0.1-18.2	12.8-60.9	32.5-87.0	12
Oread Limestone					0
Lawrence Formation	0-4.0	1.0-8.0	29.8-58.5	39.5-68.0	8